Function objIs

objIs(value1: any, value2: any): boolean

The objIs() method determines whether two values are the same value.

Two values are the same if one of the following holds:

both undefined
both null
both true or both false
both strings of the same length with the same characters in the same order
both the same object (meaning both values reference the same object in memory)
both numbers and both +0, both -0, both NaN, or both non-zero and both not NaN and both have the same value

This is different from the === operator in that:

NaN is equal to NaN
+0 is not equal to -0

Parameters

value1: any
The first value to compare
value2: any
The second value to compare

Returns boolean

True if the values are the same value, false otherwise

Since

0.12.0

Example

// Case 1: NaN
objIs(NaN, NaN);                  // true
NaN === NaN;                      // false

// Case 2: Signed zeros
objIs(0, -0);                     // false
objIs(+0, -0);                    // false
objIs(-0, -0);                    // true
0 === -0;                         // true

// Regular comparison
objIs('hello', 'hello');          // true
objIs('hello', 'goodbye');        // false
objIs(1, 1);                      // true
objIs(1, 2);                      // false

// Objects
const obj = { a: 1 };
objIs(obj, obj);                  // true
objIs(obj, { a: 1 });             // false (different objects with same content)